White plays and wins in 5 moves https://lichess.org/aaZyFwb7
- Qxa7 Kg4 2. d8=Q Kf3 3. Qd3+ Kg2 4. Qa2+ Kg1 5. Qd1#
The analysis board also does checkmate in 5 moves
- Qxa7 Kxe4 2. d8=Q Kf5 3. Qf2+ Ke5 4. Qdd4+ Ke6 5. Qe4#
Source:
This publication is in my collection "500 chess puzzles. Mate in 5. Advanced & Expert Level."